FMF Factory 4.1 Slip-On Exhaust | 042330 Grey and AMA (in accordance with

and AMA (in accordance with their environmental codes)

Husaberg FE 390 2011

Raises rev-limiter 1200 rpm over the OEM ignition

It also allows the goggle to utilize a class-leading 45mm extra-tall roll-off system for absolute clear vision on the ugliest of days

If you have the older motor

FMF Factory 4.1 Slip-On Exhaust | 042330 Grey and AMA (in accordance withThe Factory 4. 1 RCT incorporates the latest in FMF Resonance Chamber Technology both internally and externally. In addition, we achieve a shorter overall length that is less susceptible to crash damage and complementary to our Factory Forward Engineering moving the muffler closer to the motor to centralize mass. The Factory 4. 1 RCT is constructed from only aerospace grade materials that meet our exacting specifications and is manufactured 100% at